EP 0743200 B1 20000329 - Radial agricultural tire with a pitched tread
Title (en)
Radial agricultural tire with a pitched tread
Title (de)
Radialer Landwirtschaftsreifen mit einer Lauffläche von verschiedenen Pitch-Längen
Title (fr)
Bandage pneumatique radial pour véhicule agricole ayant un profil à pas variable
Publication
Application
Priority
US 44514595 A 19950519
Abstract (en)
[origin: US5733394A] The present invention relates to an agricultural tire (10) having a casing (12) with a radial ply carcass (14) and an annular tread (40) having two sets (48,50) of lugs (44). The tire (10) has a greatly reduced lug vibration. The tread (10) is divided into a plurality of circumferentially repeating design cycles of at least two, preferably three distinct design cycle lengths. The circumferentially adjacent lugs (44) of the opposite set are offset by at least one design cycle. When the pitch ratio variance of the design cycles is at least 1.1 from small length (S) to large length (L), preferably 1.25 a reduction in lug induced vibration of 30% or more is possible. The lugs 44 preferably have a lug width (W), (W) being proportional to the length of the design cycle in which a majority of the lug lies. This effectively balances the mass of tread rubber around the periphery of the tire.
IPC 1-7
IPC 8 full level
B60C 11/00 (2006.01); B60C 11/04 (2006.01); B60C 11/11 (2006.01)
CPC (source: EP US)
B60C 11/0311 (2013.01 - EP US); B60C 11/0318 (2013.01 - EP US); B60C 11/033 (2013.01 - EP US); B60C 2200/08 (2013.01 - EP US); Y10T 152/10279 (2015.01 - EP US)
Designated contracting state (EPC)
DE ES FR IT
DOCDB simple family (publication)
US 5733394 A 19980331; AR 001901 A1 19971210; BR 9602184 A 19980407; DE 69607408 D1 20000504; DE 69607408 T2 20001207; EP 0743200 A1 19961120; EP 0743200 B1 20000329; ES 2144171 T3 20000601; TR 199600393 A2 19970321
DOCDB simple family (application)
US 66860296 A 19960520; AR 33645996 A 19960509; BR 9602184 A 19960507; DE 69607408 T 19960513; EP 96107574 A 19960513; ES 96107574 T 19960513; TR 9600393 A 19960514